40 Memorable Advertising Slogans (and How to Create One) Kit Kat developed its chocolate-covered wafer biscuit of the same name in 1957 but launched its advertising efforts in full force in 1951. However, since 1951, until the company was acquired by Nestle in 1988, the worldwide slogan for the product has been "Have a break… Have a Kit Kat." #9 "Look, Ma, no cavities!" (Crest by Procter & Gamble, 1958)